Convert Anything, Instantly
Free browser-based tools to convert files, images, and data between formats. No uploads, no sign-ups — your files never leave your device.
Browse by Category
File Converters
Convert between document and spreadsheet formats including PDF, Excel, CSV, and more.
20 tools
🛠️Developer Tools
JSON, YAML, XML, Base64, and other developer-focused conversion tools.
14 tools
🖼️Image Converters
Convert images between formats like PNG, JPG, WebP, SVG, HEIC, and more.
9 tools
👁️Eye Prescription Tools
Convert between eyeglass and contact lens prescriptions with vertex distance calculations.
3 tools
📐CAD & 3D Tools
Convert CAD files, 3D models, and GIS data between formats.
3 tools
Popular Tools
Image to PDF
Convert any image (JPG, PNG, WebP, GIF, BMP) into a high-quality PDF document. Perfect for creating PDF portfolios or printable versions of photos.
Eye Prescription to 20/20 Scale
Convert your eye prescription (diopter sphere power) to the approximate Snellen 20/xx equivalent. See what your uncorrected vision would be on the familiar 20/20 scale.
Excel to CSV
Convert Excel spreadsheets (.xlsx, .xls) to CSV format. Preserves data and handles multiple sheets.
Jupyter Notebook to PDF
Convert Jupyter Notebook (.ipynb) files to PDF documents. Renders code cells, markdown, and outputs into a paginated PDF.
PDF to Grayscale
Convert a color PDF to grayscale (black and white). Each page is rendered and desaturated for printing or submission requirements.
JSON to Excel
Convert JSON arrays to Excel (.xlsx) spreadsheets. Automatically creates column headers from object keys.
HEIC to JPG
Convert Apple HEIC/HEIF photos to widely compatible JPG format. Essential for sharing iPhone photos on non-Apple devices.
TXT to Excel
Convert plain text or Notepad files to Excel (.xlsx) spreadsheets. Auto-detects tabs, commas, pipes, and other delimiters.
Why ConverterTools?
Privacy First
All conversions run directly in your browser. Your files are never uploaded to any server.
Instant Speed
No waiting for server processing. Conversions happen instantly on your device.
100% Free
No sign-up, no limits, no hidden fees. Use every tool as many times as you want.